Render functions are called repeatedly?

Question

Vue.js

I decided to write a functional component using the HOC pattern, when checking what is displayed in the console inside the render function, it is called twice, debugging does not help

render (h, context) {
      console.log('TEST')
      function approachComponentList () {
        const items = context.props.items
        if (!items) return null
        return Component
      }
...